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Degradation of 32 emergent contaminants by UV and neutral photo-fenton in domestic wastewater effluent previously treated by activated sludge.
Water Res. 2012 Apr 15; 46(6):1947-57.WR

Abstract

This study focuses on the removal of 32 selected micropollutants (pharmaceuticals, corrosion inhibitors and biocides/pesticides) found in an effluent coming from a municipal wastewater treatment plant (MWTP) based on activated sludge. Dissolved organic matter was present, with an initial total organic carbon of 15.9 mg L(-1), and a real global quantity of micropollutants of 29.5 μg L(-1). The treatments tested on the micropollutants removal were: UV-light emitting at 254 nm (UV(254)) alone, dark Fenton (Fe(2+,3+)/H(2)O(2)) and photo-Fenton (Fe(2+,3+)/H(2)O(2)/light). Different irradiation sources were used for the photo-Fenton experiences: UV(254) and simulated sunlight. Iron and H(2)O(2) concentrations were also changed in photo-Fenton experiences in order to evaluate its influence on the degradation. All the experiments were developed at natural pH, near neutral. Photo-Fenton treatments employing UV(254), 50 mg L(-1) of H(2)O(2), with and without adding iron (5 mg L(-1) of Fe(2+) added or 1.48 mg L(-1) of total iron already present) gave the best results. Global percentages of micropollutants removal achieved were 98 and a 97% respectively, after 30 min of treatments. As the H(2)O(2) concentration increased (10, 25 and 50 mg L(-1)), best degradations were observed. UV(254), Fenton, and photo-Fenton under simulated sunlight gave less promising results with lower percentages of removal. The highlight of this paper is to point out the possibility of the micropollutants degradation in spite the presence of DOM in much higher concentrations.

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Authors+Show Affiliations

De la Cruz N
Institut des Sciences et Ingénierie Chimiques, GGEC, EPFL, Bât. CH, 1015 Lausanne, Switzerland.
Giménez J
No affiliation info available
Esplugas S
No affiliation info available
Grandjean D
No affiliation info available
de Alencastro LF
No affiliation info available
Pulgarín C
No affiliation info available

MeSH

Biological Oxygen Demand AnalysisCarbonEnvironmental Restoration and RemediationFamily CharacteristicsHydrogen PeroxideHydrogen-Ion ConcentrationIronLimit of DetectionSewageUltraviolet RaysWaste Disposal, FluidWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22305640

Citation

De la Cruz, N, et al. "Degradation of 32 Emergent Contaminants By UV and Neutral Photo-fenton in Domestic Wastewater Effluent Previously Treated By Activated Sludge." Water Research, vol. 46, no. 6, 2012, pp. 1947-57.
De la Cruz N, Giménez J, Esplugas S, et al. Degradation of 32 emergent contaminants by UV and neutral photo-fenton in domestic wastewater effluent previously treated by activated sludge. Water Res. 2012;46(6):1947-57.
De la Cruz, N., Giménez, J., Esplugas, S., Grandjean, D., de Alencastro, L. F., & Pulgarín, C. (2012). Degradation of 32 emergent contaminants by UV and neutral photo-fenton in domestic wastewater effluent previously treated by activated sludge. Water Research, 46(6), 1947-57. https://doi.org/10.1016/j.watres.2012.01.014
De la Cruz N, et al. Degradation of 32 Emergent Contaminants By UV and Neutral Photo-fenton in Domestic Wastewater Effluent Previously Treated By Activated Sludge. Water Res. 2012 Apr 15;46(6):1947-57. PubMed PMID: 22305640.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of 32 emergent contaminants by UV and neutral photo-fenton in domestic wastewater effluent previously treated by activated sludge. AU - De la Cruz,N, AU - Giménez,J, AU - Esplugas,S, AU - Grandjean,D, AU - de Alencastro,L F, AU - Pulgarín,C, Y1 - 2012/01/24/ PY - 2011/10/26/received PY - 2012/01/12/revised PY - 2012/01/16/accepted PY - 2012/2/7/entrez PY - 2012/2/7/pubmed PY - 2012/6/6/medline SP - 1947 EP - 57 JF - Water research JO - Water Res VL - 46 IS - 6 N2 - This study focuses on the removal of 32 selected micropollutants (pharmaceuticals, corrosion inhibitors and biocides/pesticides) found in an effluent coming from a municipal wastewater treatment plant (MWTP) based on activated sludge. Dissolved organic matter was present, with an initial total organic carbon of 15.9 mg L(-1), and a real global quantity of micropollutants of 29.5 μg L(-1). The treatments tested on the micropollutants removal were: UV-light emitting at 254 nm (UV(254)) alone, dark Fenton (Fe(2+,3+)/H(2)O(2)) and photo-Fenton (Fe(2+,3+)/H(2)O(2)/light). Different irradiation sources were used for the photo-Fenton experiences: UV(254) and simulated sunlight. Iron and H(2)O(2) concentrations were also changed in photo-Fenton experiences in order to evaluate its influence on the degradation. All the experiments were developed at natural pH, near neutral. Photo-Fenton treatments employing UV(254), 50 mg L(-1) of H(2)O(2), with and without adding iron (5 mg L(-1) of Fe(2+) added or 1.48 mg L(-1) of total iron already present) gave the best results. Global percentages of micropollutants removal achieved were 98 and a 97% respectively, after 30 min of treatments. As the H(2)O(2) concentration increased (10, 25 and 50 mg L(-1)), best degradations were observed. UV(254), Fenton, and photo-Fenton under simulated sunlight gave less promising results with lower percentages of removal. The highlight of this paper is to point out the possibility of the micropollutants degradation in spite the presence of DOM in much higher concentrations. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/22305640/Degradation_of_32_emergent_contaminants_by_UV_and_neutral_photo_fenton_in_domestic_wastewater_effluent_previously_treated_by_activated_sludge_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(12)00034-6 DB - PRIME DP - Unbound Medicine ER -